Home / 2,687.06-3,708.33-1,638.98

Finding the Fourth Proportional to 2,687.06, 3,708.33 and 1,638.98

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Solution

The fourth proportional to 2,687.06, 3,708.33 and 1,638.98 is: 2,261.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.06 : 3,708.33 = 1,638.98 : x
  2. Step 2: Convert to fraction form
    2,687.06/3,708.33 = 1,638.98/x
  3. Step 3: Cross multiply
    2,687.06x = 3,708.33 × 1,638.98
  4. Step 4: Simplify right side
    2,687.06x = 6,077,878.70
  5. Step 5: Solve for x
    x = 6,077,878.70/2,687.06
  6. Step 6: Final answer
    x = 2,261.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.